Metal drum



E. WANDREY June 6, 1939.

METAL DRUM Filed Sept. 23, 1938 Patented June 6, 1939 METAL DRUM Erwin Wandrey, Chicago, 111., assignor .m a. n. Hayward Company, Chicago,'lll., a corporation of Illinois .ApplicationfSeptember 2s, s1938,*Serial No. 231,437

1 Claim. (01. 242-77) UNlT-E -D STATES PATENT oFrioE My invention :relates :generally to metal drums, but more particularly, though not exclusively,to drums :formin'g'parts-of reels'provided, as for example, for the win'dingthereon of electric cable,

r or the like, .and more especially reels formed of spaced apart heads between which the drum portionzis interposed and secured, as for example by'tie rods extending from headto head through inwardly extendingiportions at the ends of the mzdrum.

One of my objects is itoimp-rove upon the constructions of metal drums especially of the character above referred to as hitherto provided, to the :end of producing a construction which will -l'si -aflordbetter service and be more economical of manufacture and of lighter weight than constructions 'a's hitherto provided.

Another object is to provide a drum structure fabricated of a metal shell and reinforcing, stiffigu ening, annular members welded'in 'positionin the ends of the shell and which willnotzbesubject'to objectionable deformation in the subjection of thestructure to heat in the galvanizing thereof.

,Another object is to provide a construction of 3 drum of the character stated, with-its shell portion constructed ofhigh carbon steel of relatively light-gage, :such as for example No. 1-6,:gage, presenting great resistance to denting in use and which-will not be-subject to objectionable deformation in the subjecting of the shell, with the reinforcing annular members welded thereto, to galvanizing heat.

Another object is to provide a construction of drum presenting the desired strength and which 0 when secured in interposed position between the heads of a reel will present inv conjunction with the inner faces of the heads annular right angled corners the provision of which insures the proper positioning of the cable, or the like, even when of w small diameter, about the circumference of the shell; and other objects as will be manifest from the following description.

Referring to the accompanying drawing:

Figure 1- is a view in front elevation of a reel of the general character above referred to comprising, as an element thereof, a drum constructed in accordance with my invention, portions of the shell of the drum being broken away to disclose interior details.

Figure 2 is a section taken at the line 2 on Fig.

1 and viewed in the direction of the arrow.

Figure 3 is an enlarged fragmentary sectional view taken at the line 3 on Fig. 2 and viewed in the direction of the arrow; and

Figure 4, an enlarged fragmentary sectional view taken at the line 4 on Fig. 2 and-viewed ln the directionofthe'arrow.

Referring to the illustrated construction, it comprises a pair of circular heads iandt, and an interposed drum 1 embodying my'invention, 5 the heads and drum being secured together 'as hereinafter described.

The drum 1 'whichis made of metal comprises a cylindrical shell 8 which may be formed in-any suitable way from sheet metal suchias forexam- 10 Die sheet steel "and more particularly'high carbon sheet steel as such "kind of steel .is much less susceptible to denting than the .low carbon steels.

The drum 1 also comprises metal bandsta 'located in .the ends of the shell *8 and shown set 1;, back a slight distance -''from the "adjacent ends ol' the shell to receive the rings hereinafter referred to. Y r 1 Each band Sybyxway of-exampletmay-be formed of a single length of suitable metal bent .into substantially circular form .and,in :the springing thereof into place in-the-ends ofthe shell .8, snugly fitting the inner periphery of the shell. The bands 9 at intervals 'spacedapart about'the'circumferences thereof are welded to the shell. Preferably, and as shown, the welding of :these bands to the shell "is effected by forming .openings H) at intervals-in each'bandthese openings preferably being somewhat elongated in the direction of the circumference of the band, and welding the bands to the shell through the open,- ings in, the metal of the welds being represented at H. While the welding through openings in the bands is preferred as stated, the welding of the bands at spaced apart points about their circumferences may be effected in other ways as for example by spot welding the bands to the shell or welding them thereto at the junctures of the inner edges of the bands with the inner periphery of the shell.

The drum also comprises rings [2 located in the ends of the drum, these rings, which extend transversely of the drum as shown, extending at their outer margins into the interior annular angles formed at the junctures between the outer edges of the bands 9 and the portions of the shell 8 projecting beyond these bands, the ends of the shell being substantially flush with the outer faces of the rings [2.

The rings I2 are secured to the bands 9 by welding these parts together, there being no direct connection between the rings I2 and the shell 8. V

The rings l2 are preferably welded to the adjacent bands 9 at spaced apart points along the interior annular angles formed by the inner faces of the rings 12 and the inner peripheries of the bands 9, as represented at I3, this welding being effected at spaced apart points about the bands, as represented, the welds [3 preferably alternating with the welds II with each weld l3 equidistantly spaced from the adjacent welds H as clearly illustrated in Fig. 2.

The bands 9- and the rings l2 which form stiffening and reinforcing means for the shell, and may, by way of example, be made of low carbon steel, are of a thickness relatively great compared to the thickness of the sheet metal of the shell 8 which latter may be as thin as 1 inch.

The bands 9 may be about inch thick and from to inch wide and the rings I 2 about inch thick and from 1 to 3 inches deep. It will be understood, however, that the dimensions above given are only by way of example and that no limitation of the invention thereby is intended.

The heads 5 and 6 and drum 7 are shown as secured together by tie bolts l4 which extend continuously through openings in the heads 5 and 6 and through openings IS in the rings I2.

As will be understood, the desired thickness of metal at the ends of the drum to resist shear at the bolts l4 may be provided, without regard to the gage or kind of metal of which the shell 8 is formed, by reason of the provision of the annular members in the ends of the shell. Thus I am enabled to avail myself, in a highly practical construction, of the advantage of using high carbon steel for the shell 8 to prevent denting, while providing the necessary thickness of metal at the bolt holes in the drum to present the desired resistance to shear; a condition not possible of attainment where the bolt engaging flanges of the drum are formed by turning inwardly the ends of the metal sheet of which the shell of the drum is formed, except by'forming the shell of such thickness as to render the reel expensive to manufacture and of objectionable weight.

As will be noted, the interior annular angles between the inner faces of the heads 5 and 6 and the shell 8 are of right angled form as distinguished from a construction in which the ends of the shell are rounded over inwardly toward the center of the shell, and thus a cable, or the like, even when of small diameter, wound upon the drum, occupies the desired position about the shell.

Drum structures for reels are commonly galvanized before assembly with the heads, by immersing them in a galvanizing bath of suitable molten metal the heat of which causes stresses existing in the fabricated structure as a result of welding the parts together, to become relieved. Provision for preventing such relief of the stresses from producing objectionable deformation of the drum are necessary. This is accomplished by my built-up drum, the welding of the rings I2 to the bands 9 at spaced apart intervals at I3, staggered with relation to the welds H, being preferred as thereby the cost of manufacture and deformation resulting from the heat of galvanization are minimized.

In accordance with the particular construction shown the rings I2 need not accurately fit the ends of the shell and thus do not require to be machined which is a great factor in minimizing the cost of construction.

While I have illustrated and described a par-- ticular construction embodying my invention and suggested certain modifications thereof I do not Wish to be understood as intending to limit it thereto as the structure shown may be modified and altered in other ways, and the invention embodied in other forms without departing from the spirit of the invention.

What I claim as new and desire to secure by Letters Patent, is:

A metal drum comprising a drum-wall-forming shell, bands in the ends of said shell and set back from the terminal edges thereof, said bands having openings therethrough, weld means in said openings securing said bands to said shell at spaced apart intervals around the bands, rings located in the endsof said shell outwardly beyond said bands, the outer faces of said rings being substantially flush with the terminal edges of said shell, weld means securing adjacent ones of said bands and rings together at-spaced apart intervals around the rings and disposed in staggered relation to said first-named welds and substantially equidistantly spaced from adjacent ones of said first-named welds, said rings being free of connection with said shell.

ERWIN WANDREY. 

